按键控制LED流水灯；按键1按下前8个灯从左到右依次点亮，按键2按下中间前8个灯从左到右依次点亮，按键3按下所有灯全亮-Water control button LED lights　sequentially lit buttons the eight lights left to right 1 Press button 2 press from left to right is lit in the middle eight lights, key 3 Press All full bright light